For the second day in a row across Turkey, ultra-nationalists ransacked offices of the pro-Kurdish People's Democracy Party (HDP) as tension between Kurds and far-right activists spilled over into violence.

The flared tensions follow an attack by the outlawed Kurdistan Worker's Party (PKK) on Sunday that killed 16 Turkish soldiers, the largest strike carried out by the group since hostilities with the government resumed in July.

In reaction to the attack, thousands of Turks have taken to the streets this week to protests against the PKK and its intensified attacks on Turkish forces.

It is out of these protests that attacks on the HDP offices began on Monday in towns and cities across the country, including those in Konya, Izmir and Antalya. By Tuesday morning, the party's co-chair Figen Yüksekdağ said that 128 offices had been ransacked. "All were carried out under police supervision," he said.

Amateur video showed the HDP offices in Istanbul being vandalised late on Tuesday:

Rudaw, the Iraqi Kurdish news agency, reported that gunmen had opened fire on the HDP offices in Ankara late on Tuesday, following a fire which had been set in the building shortly before.

Many of the attacks were reportedly initiated by supporters of the far-right Nationalist Movement Party (MHP) and members of the Grey Wolves (Ülkücü Ocakları), an ultra-nationalist organisation which has close links to the party, whose members believe that the PKK and Kurdish activists are seeking to break up the country.

Video appeared to show far-right activists in Istanbul - many making the three finger Grey Wolves gesture - chanting "we don't want operations, we want a massacre!"

According to the pro-Kurdistan Workers' Party (PKK) Firat News Agency, around 2,000 ultra-nationalists ransacked the HDP building in the southwestern town of Isparta, throwing chairs out the windows and setting the office on fire.

The group reportedly chanted “martyrs are immortal, our land is indivisible!" as they fled the scene.

The offices of the Hurriyet newspaper - which is seen as critical of the ruling Justice and Development Party (AKP) government - also came under attack in Istanbul.